Design and Cost Estimating Services

Walden prepares engineering designs for a vast array of projects, working closely with clients from preliminary concepts to final design.  We first evaluate our client’s needs and formulate designs within the site parameters and framework of regulations and standards that apply to the project.  We evaluate site conditions, identify applicable design standards, and complete engineering calculations to develop the design.  Design drawings are prepared throughout the process and presented to the client to ensure that the design meets expectations. Walden can help you design projects including the following:


  • Engineering Design
  • Cost Estimating and Value Engineering
  • Environmental Tax Certiorari Claim Support
  • Capital Project Planning and Bonding Support
  • Roadway Design
  • Emergency Generator Design and Installation Oversight
  • Solid Waste Facility Design and Layout
  • Fueling Systems
  • Septic Systems
  • Drainage Systems
  • Bulkheads/Outfalls
  • Building Modifications
  • Stormwater Mapping and Planning
  • Stormwater Treatment Systems
  • Surveying
  • Utility Mapping
  • Air Treatment Control Design



Town Highway Yard Drainage Design and Oversight, Nassau, NY

A local Town has operated a satellite highway yard for many years on Town owned property.  The yard was an asphalt paved lot that stored various trucks, equipment, debris and salt, while having no drywells or other storage/infiltration structures to provide on-site drainage storage capacity. In recent years, in an effort to decrease annual truck miles, the Town has increased the use of the yard and required more permanent facilities including: a salt storage dome; diesel fueling dispenser; office building; and storm water collection, treatment and recharge system. read more

Fire House Flood Proofing, Nassau County, NY

Walden provided design services for a resiliency improvements project at a Fire House owned by our client, a local municipality on the South Shore of Long Island. The project is being implemented under a FEMA Hazard Mitigation Plan (HMP) to prevent future damage due to flooding and wind damage in order to ensure that this critical facility remains operational during severe weather events.  This FEMA mitigation project is being performed in step with an on-going Governor’s Office of Storm Recovery (GOSR) Fire House resiliency project being managed by another Village consultant.  read more